Programme

P.52 -- Poster, VCTP-49

Date: Friday, 2 August 2024

Time: 08:30 - 10:00

Study of nonlinear phenomena in advanced materials and devices: insights from distinct approaches

(1) Tran Ky Vi , (2) Nguyen Viet Hung, (3) Nguyen Quang Hoc, (3) Bui Duc Tinh, (4) Nguyen Dang Quang Huy, (5) Tran Chi Quy

(1) Physics and Young Magazine, Vietnam Physics Society; Hanoi University of Science and Technology; (3) Hanoi National University of Education; (4) VNU Vietnam Japan University; (5) Hanoi-VNU University of Science

This research explores three branches of nonlinear phenomena using distinct approaches. The first branch employs the statistical momentum method for nonlinear mechanics, calculating elastic deformation properties of Fe and its alloys (FeSi, FeC, FeH), highlighting temperature and pressure dependencies. The second branch investigates nonlinear photonics through a hybrid variational method applied to the nonlinear Schrödinger equation, analyzing beam propagation and soliton interactions in graded-index optical waveguides, and validating these findings with simulations. The third branch studies superconducting materials using the time-dependent Ginzburg-Landau equation with thermal noise, modeling transport properties near the critical temperature, and demonstrating that high electric fields suppress fluctuations and maintain residual superconductivity above Tc, consistent with Sn nanowire experiments.

Presenter: Tran Ky Vi